Oven



FIG. 1 is a perspective view of an oven showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of the remainder of the oven is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for an oven, as shown and described. 